 <header class="main-header">
 	<script type="text/javascript">
		$(function(){
			showtime();
		}); 
	</script>
    <!-- Logo -->
    <a class="logo">
      <!-- logo for regular state and mobile devices -->
      <span style="margin-left: -16px;"><img src="img/logo.png"></span>
    </a>

    <!-- Header Navbar: style can be found in header.less -->
    <nav class="navbar navbar-static-top" role="navigation">
      <!-- Sidebar toggle button-->
      <a class="sidebar-toggle" data-toggle="offcanvas" role="button">
        <span class="sr-only">Toggle navigation</span>
      </a>
      <div class="navbar-custom-menu">
        <ul class="nav navbar-nav">
          <li class="dropdown user user-menu" style="padding-right:0px">
            <a href="http://www.bjcxyl.com/stage.php">
                <span style="color:white;font-size:20px">返回首页<span>
            </a>
          </li>
          <!-- User Account: style can be found in dropdown.less -->
          <li class="dropdown user user-menu">
          	<a href="#/login">安全退出</a>
          </li>
          <!-- 时间显示 -->
          <li style="line-height: 50px;margin:0px 10px;">
			<span id="clock" style="font-size: 16px;color: navajowhite;"></span>
		</li>
          <!-- Control Sidebar Toggle Button -->
          <li>
            <a href="javascript:void(0);" data-toggle="control-sidebar"><i class="fa fa-gears"></i></a>
          </li>
        </ul>
      </div>
    </nav>
  </header>